Weather strip



13, 1934- A. MACKLANBURG 1,947,349

WEATHER STRIP Filed March 21, 1932 Lou/s A. MA CKLANB URG Patented Feb. 13, 1934 WEATHER s'rarr Louis A. Macklanburg, Oklahoma City, can.

Application March 21,

1 Claim.

This invention relates to Weatherstripping; and more particularly, to metallic Weatherstripping wherein one strip portion is secured to a frame member and the other strip is free.

The prime object of my invention is to pro vide reinforcing elements along the free strip of the Weatherstrip to prevent the metal from breaking during the flexing action. It is customary to have the grain of the metal run lengthwise of the strip, and constant flexing results in the metal breaking. I have illustrated in the drawing as an example of weatherstrip to which my invention is particularly adapted, Weatherstripping covered by Patent No. 1,477,225. By embossing or otherwise interrupting the grain of the metal, I find that the strip is materially strengthened and the breaking of the strip largely obviated.

Other objects will be disclosed in the specification and claims forming a part of my application.

In the drawing:

Figure 1 is a perspective of the strip mounted on a block; and

Figure 2 is a section taken on line 2-2 of Figure 1.

Referring to the drawing, in which similar parts are designated with like numerals:

Numeral 3 designates a nailing strip of a length of metallic Weatherstrip secured to the runway 4 of a window and having a free contact strip 5. The grain 6 of the Weatherstrip runs lengthwise thereof, and the constant flexing of the free strip 5 has a tendency to break in line with the grain 6. The breaking of the free strip 5 is largely due to the constant flexing of the free edge 5, and in turn the break will occur at the weakest point. It has been found that the break will occur in the direction of the grain and will continue along the grain 6 until the structure is completely severed. lengthwise. l". have found that by interrupting the grain 6, the breaking of the material is substantially reduced and that by interposing these interruptions at various points out of line with each other, the best results are obtained. These interruptions take the form of embossments '7. Various designs may be used, such as stars, diamonds or circles, and I have found that not only are fractures reduced, but the strip is greatly strengthened without interfering with the necessity for the free strip 5 to be flexible in order to make contact. These embossments '1 are staggered so as to completely cover the metal surface and give the most efficient results.

1932. Serial No. 6%,3l35

(C1. ze-ce) As is well known in this art, metallic weatherstripping of the character illustrated in the drawing is made of exceedingly thin material.

in the manufacture thereof in lengths, the metal forms a grain running lengthwise. Since the to weatherstrips thus manufactured. are subjected to constant flexing when in use, it has been found that the contact strip portion cracks or breaks lengthwise oi the grain after considerable use. In order to obviate this cracking, or lengthwise rupture, of the contact strip portion of the Weatherstrip it has been found necessary to provide interruptions running lengthwise of the grain and stag ered so as to limit splitting between these interruptions. '0

In the present invention the interruptions take the form of embossments spaced lengthwise of the free strip portion and staggered so as not only to interrupt any lengthwise fractures of the strip but also to strengthen this free strip portion. The staggered embossments, however, are not placed there entirely for the purpose of strengthening the free portion of the weatherstrip.

Because of the very thin structure or" these weatherstrips, when made out of material light enough to flex properly, these strips vibrate, whistle and hum when a strong wind blows against a door or window provided with them. in other words, the strips form a reed which, under certain conditions, emit a note more or less musical. The vibration, of course, is caused the uniformity of the grain of the metal. It has been found, in actual use, that when the grain of this metal is interrupted by the embossments such as shown in this application, the vibration of the strip is broken up and all noises, humming whistling are eliminated. The embossmcnts in effect act as a damping means such as might be applied to a tuning fork Q to dampen the vibrations and cause cessation of the objectionable noises.

Having thus described I claim is:

A flexible metallic Weatherstrip comprising: a strip portion adapted to be secured to a frame member, and a free contact strip portion flexibly connected to the attaching portion, said strip being provided with embossments spaced apart lengthwise thereof and staggered in relation to each other to strengthen the said free portion and to dampen the vibration thereof.

LOUIS A. MACKLANBURG.

my invention, what 

